/Engine/Source/Developer/MaterialUtilities/Public/MaterialUtilities.h
Get the name of the Texture parameter associated with a given flatten material property
static [FString](API\Runtime\Core\Containers\FString) GetFlattenMaterialTextureName ( [EFlattenMaterialProperties](API\Developer\MaterialUtilities\EFlattenMaterialProperties) InProperty, [UMaterialInterface](API\Runtime\Engine\Materials\UMaterialInterface) * InBaseMaterial )